Size and growth rate measurements apply to shell height. Most work suggests that maturity is reached at between 10-12mm shell height. Littorina littorea has various biochemical adaptations that allow the stressful intertidal habitat to be exploited. The species tends to aggregate and form clusters in areas that are more favourable for them, such as rock pools, rather than drier areas. Males are believed to mature earlier than females but females mature at a smaller size. Animals are more active when submerged due to the lower cost of moving on mucus when under water.